We currently don't have a definitive explanation for why more boys are born than girls.
While it's a documented fact that, on average, approximately 105 boys are born for every 100 girls, the precise biological mechanisms causing this skew remain unclear. This natural sex ratio at birth is observed globally, although it can be higher in certain regions.
Here's a breakdown:
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Observed Ratio: The generally accepted ratio is 105 boys to 100 girls at birth.
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Unexplained Phenomenon: Despite ongoing research, the specific reason(s) for this imbalance is not fully understood.
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Regional Variations: Some regions, especially in Asia and Central Europe, see an even higher male-to-female birth ratio, sometimes exceeding 120 boys per 100 girls. The factors influencing these regional differences are also not fully understood but could be related to societal preferences or other environmental factors.
In summary, the higher birth rate of boys compared to girls is a biological observation without a complete and accepted explanation at this time.